Author Archives: Raghavendar T S

SpaceTop – An Interactive 2D & 3D Computer

SpaceTop – An Interactive 2D & 3D Computer

            SpaceTop is a technology and design to make 2D and 3D spacial interaction in a desktop computer. While a traditional desktop uses a keyboard and a mouse for interaction, SpaceTop uses a completely redefined display setup and visualization for seamless 2D and 3D interaction on the objects on the display. SpaceTop allows users to type, click, draw in 2D, and directly manipulate interface elements that float in the 3D space above the keyboard. SpaceTop uses special hardware which included a depth camera and a transparent display.


           The display will look like a transparent thin screen and we will be able to directly interact with the objects on the display screen.Users place their hands behind the screen to manipulate the icons and apps, while a camera tracks their eye position and adjusts the angle, making it appear as though the box is really 3D. There are a lot of researches going on to make the SpaceTop go commercial. The SpaceTop 3D computer is still in the early stages, and no consumer devices are currently planned.


Raspberry Pi – USB Tethering (How to make Internet work in Raspberry Pi by USB Tethering)

Raspberry Pi – USB Tethering (How to make Internet work in Raspberry Pi by USB Tethering)

How to make Internet work in Raspberry Pi(RPi) by USB Tethering

USB Tethering will not work with initial default configuration of the USB port in RPi. We need to enable the network interface for the USB port to make the internet work with USB tethering. Follow the below steps to  make internet work with USB tethering.

Note: Take backup of the file before you edit

1. Boot Raspberry Pi

2. In the start up screen enter the following command to open the file “interfaces”

                   > sudo vi /etc/network/interfaces

sudo will execute the command with administrator privileges

This will open the file “interfaces” in the location /etc/network

3. Add the following line “iface usb0 inet dhcp”  below

auto eth0
iface eth0 inet dhcp

The modified code will look like

auto eth0
iface eth0 inet dhcp
iface usb0 inet dhcp

4. To save the file press the following keys

5. Now enter the following command and press ENTER key
                        >sudo ifup usb0

                        Now you will see some auto generated commands on the screen
ifup command will bring a network interface up

6. Reboot Raspberry Pi by executing the command
>sudo reboot

7. Enjoy!!!

Test Configuration:
        RPi : Raspberry Pi ModelB
        RPi OS : Raspbian “wheezy” OS
        Mobile OS : Sony Ericsson Xperia Mini Pro (Android Ice Cream Sandwich)

Nvidia Shield – Gaming console and controller

Nvidia Shield – Gaming console and controller

          Nvidia Shield is an upcoming android (Jelly Bean)  based handheld gaming console from Nvidia which is currently available for pre-order for 349USD. The gaming console looks similar to Xbox 360 controller, but it comes with additional flip-up 5inch 720p (1280×720) display with built in integrated stereo speakers  and microphone. The amazing feature of Shield is that we can stream the games present in the GTX systems directly to Shield through WiFi with minimal latency.

Nvidia Shield – Gaming Revolution

Hardware and Software Specification

Processor:        NVIDIA Tegra 4 Quad Core Mobile Processor(1.9 GHz quad-core Cortex-A15)

Memory:          2GB RAM

Graphics:          Custom 72-core GeForce

Display:            5 inch 1280×720 (294 ppi) Multi-Touch Retinal Quality Display

Storage:           16GB Flash Memory

Wireless:          802.11n 2×2 Mimo, Wi-Fi, Bluetooth 3.0, GPS

Connectivity:   Mini-HDMI output, Micro-USB 2.0, MicroSD storage slot, 3.5mm stereo                                         headphone jack with microphone support

Nvidia Shield – Controller
Nvidia Shield


  • Play games from TegraZone
  • Stream desktop or laptop games to Shield through WiFi
Nvidia Shield – Side View
Nvidia Shield – Input/Output Ports

System Requirements for PC Game Streaming:

  • GPU: GeForce GTX 650 or higher desktop GPU (Notebook GPUs are not supported at this time)
  • CPU: Intel Core i3-2100 3.1GHz or AMD Athlon II X4 630 2.8GHz or higher
  • System Memory: 4GB or higher
  • Software: GeForce Experience application and latest GeForce drivers
  • OS: Windows 8 or Windows 7
  • Routers: 802.11a/g router (minimum). 802.11n dual band router (recommended)


Nvidia Shield – Stream game to Tele

Nvidia Shield is available for $299 USD. There is also a limited edition t-shirt free with Nvidia Shield in US and Canada only.

Raspberry Pi – A credit card sized computer for 25$

Raspberry Pi – A credit card sized computer for 25$

              Have you ever heard of a computer which is sized like a floppy disk? Of-course we already have Intel’s NUC, Sapphire’s VS8 etc. But are they really as small like a floppy disk? No, they are not.Here we have such a small computer which is  85.60mm x 56mm x 21mm in size and 45 grams in weight called Raspberry Pi from Raspberry Pi Foundation. The computer is available in two models which are named Model A and Model B. The specifications of the two models are specified below.

Model B:

Price                 : 35$
CPU                  : 700 MHz ARM single core processor
Memory            : 512 MB
USB 2.0 ports    : 2
Video outputs   : Composite RCA and HDMI (14 HDMI resolutions from 640×350 to 1920×1200)
Audio outputs   : 3.5 mm jack, HDMI
Storage             : SD / MMC / SDIO card slot
Network            : 10/100 Ethernet
GPU                  : Broadcom VideoCore IV
OpenGL ES 2.0
MPEG-2 and VC-1
1080p30 h.264/MPEG-4 AVC high-profile decoder and encoder
OS                     : Debian GNU/Linux, Raspbian OS, Fedora, Arch Linux ARM, RISC OS,FreeBSD, Plan 9

         The model A doesn’t come with the ether net port and number of USB slots is only one. the memory available is also only 256MB RAM.  The price of the Model A is only 25$. the one of the great advantage of this computer is its FullHD video output support. The product can be used for many kinds of applications which includes general use of the computer, education, embedded systems project and many more.

World’s Smallest PC- Intel Vs AMD

World’s Smallest PC- Intel Vs AMD

         The size of the computers are getting small day by day. The technology partners and manufacturing partners are competing each other to deliver their best. Here we have Intel’s Next Unit of Computing (NUC) and Sapphire Edge VS8 which is powered by AMD APU. The Intel’s product comes with different configuration and the Sapphire Edge VS8 comes only with single configuration. The two products are discussed below.

Intel’s Next Unit of Computing

The size of the Intel’s NUC is four inches square by two inches high. The NUC is avaliable in 3 models. The first model is DC3217BY which is powered by Core i3 3217-U processor, an HDMI audio-video port, and a Thunderbolt port. The second model is DC3217IYE which is powered by Core i3 3217-U processor and dual HDMI ports. The third model is DCCP847DYE which is powered by Celeron 847 processor and dual HDMI ports. All the above 3 models are capable of delivering FullHD display out. The SSD can be coupled with the NUC to get high performance computing and NUC supports for DDR3 SODIMM RAM memory which is smaller in size compared to the traditional RAM used in desktop.


  • full- and half-size mini-PCIe slots
  • two USB 2.0 ports
  • a gigabit Ethernet port
  • a Kensington lock socket

The one of the main disadvantage is that the NUC doesn’t support for USB 3.0 and eSATA.

Sapphire Edge VS8

             It is a new family of mini PC which is based on latest Accelerated Processing Unit (APU) technology from AMD. It is very compact and its sleek design resembles like design of a router. The Sapphire Edge VS8 is powered by AMD APU A8 1.6GHz Quad Core processor and 4GB RAM which delivers high performance  The storage capacity is 500 GB. It also includes AMD RadeonTM HD7600G for decent gaming performance.


  • Built-in Ethernet
  • 802.11 b/g/n Built-in Wireless Network
  • Built-in Bluetooth 3.0
  • I/O Ports
    • 1 x Mini Display Port
    • 1 x HDMI Port
    • 4 x USB 2.0 Port
    • 1 x Audio-in
    • 1 x Line-out
    • 2 x USB 3.0 Port
    • 1 x Optical SPDIF
    • 1 x SD Card Reader


           Who wins the game? It purely depends on our need because the NUC has got powerful processor compared to the AMD’s processor technology. But if you are a gamer Sapphire wins the game since it has integrated RadeonHD GPU. Also Sapphire VS8 has got numerous I/O ports compared to the Intel’s NUC. The main disadvantage with the NUC is that it lack the USB 3.0 port. However the thunderbolt technology in NUC  provides connectivity to premium priced peripherals to take advantage of the technology.